org.hibernate.NonUniqueObjectException: a different object with the same ide

org.hibernate.NonUniqueObjectException: a different object with the same ide出现这种情况一般是一对多或者多对多级联方面，我的情况是两边同时级联 把关联表的留下，外界表的去除即可    @OneToMany(mappedBy="admin")//,cascade=CascadeType.ALL)//,fetch=FetchType.EAGER)    public Set<AdminRole> getAdminroles() {        return adminroles;    }    @ManyToOne(cascade=CascadeType.ALL)//,fetch=FetchType.EAGER)    @JoinColumn(name="adminId")    public Admin getAdmin() {        return admin;    }